KR100933335B1 - How to detect leakage of electrical wire - Google Patents

How to detect leakage of electrical wire Download PDF

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KR100933335B1
KR100933335B1 KR1020090019591A KR20090019591A KR100933335B1 KR 100933335 B1 KR100933335 B1 KR 100933335B1 KR 1020090019591 A KR1020090019591 A KR 1020090019591A KR 20090019591 A KR20090019591 A KR 20090019591A KR 100933335 B1 KR100933335 B1 KR 100933335B1
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South Korea
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voltage
ground
barbed
detecting
capacitor
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KR1020090019591A
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Korean (ko)
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박후원
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(주)카스트엔지니어링
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/02—Wire fencing, e.g. made of wire mesh
    • E04H17/04—Wire fencing, e.g. made of wire mesh characterised by the use of specially adapted wire, e.g. barbed wire, wire mesh, toothed strip or the like; Coupling means therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing

Abstract

PURPOSE: A method for detecting an electric leakage is provided to improve electricity consumption and operation reliability by detecting an electric leakage in a place in which an electric barbed-wire fence is installed. CONSTITUTION: A large capacity capacitor(C) is connected between a ground(GND) and E of an L2 side of a high voltage transformer. A DC voltage(VD) is applied to both ends of the capacitor through a resistor(R) for voltage drop. A virtual resistor(RL) is generated between the barbed-wire fence and the ground in an electric leakage state of a barbed-wire fence(H) and the ground. An leakage current(IL) is generated in the electric leakage state of the ground and the barbed-wire fence. A voltage(VC) of both ends of the capacitor is dropped by the resistor for the voltage drop according to a flow of the leakage current. An electric leakage state is detected by detecting the voltage of both ends of the capacitor lower than the DC voltage.

Description

전기 철조망의 누전 탐지 방법{How to detect leakage of electrical wire}How to detect leakage of electrical wire

본 발명은 고압 충격 전류가 공급되는 전기 철조망에서 대지와의 사이에 누전을 탐지하는 방법이다.The present invention is a method for detecting a short circuit between the earth and the ground in an electric barbed wire supplied with a high-voltage shock current.

기존의 멧돼지 퇴치기나 목장에서 사용하는 전기 철조망에는 고압 충격전류(lmpules)가 공급되고 있으며, 그 방식은 도 1에서와 같이 고압 트랜스(H.T)의 2차측 권선 L 2 에 고압이 발생되고, 이 L 2의 양단 중 저압측 한쪽 끝(E)은 접지(GND)시키고, 고압측 한쪽 끝(H)은 철조망에 공급된다.The high-voltage shock current (lmpules) is supplied to the electric barbed wire used in the conventional wild boar repellent or ranch, the high pressure is generated in the secondary winding L 2 of the high voltage transformer (HT), as shown in FIG. One end E of both ends of 2 is grounded GND, and one end H of the high pressure side is supplied to the barbed wire.

따라서 이러한 방식으로는 고압 철조망(H 측)이 대지와의 사이에 빗물이 스며들거나 풀이 자라서 누전이 되더라도 이를 알아내기가 불가능하다.Therefore, in this way, even if the high-voltage barbed wire (H side) is leaked by the rain or seeps in between the ground, it is impossible to find out.

본 발명은 상기 문제점을 해결한 것이다.The present invention solves the above problems.

본 발명은 고압 충격전류를 발생시키는 전기 철조망 회로에서 고압트랜스의 L 2측의 E와 접지(GND) 사이에 대용량 커패시터(C)를 연결해두고, 이 C의 양단에 전압강하용저항(R)을 통해 DC전압(VD)을 인가해두면, 철조망(H)과 대지(GND) 사이에 누전이 될 경우, 철조망과 대지 사이엔 가상의 RL이 발생하는 것으로 볼 수 있고, 여기에 누설전류(IL)가 흐르게 되어 C양단의 전압(a와 b사이점) VC는 R에 의한 전압강하로 VD보다 낮아지게 되므로 이를 감지하여 누전여부를 알 수 있게 한 방법이다.In the present invention, a large-capacity capacitor (C) is connected between E and L on the L 2 side of the high-voltage transformer in an electric barbed wire circuit generating a high-voltage shock current, and a voltage drop resistance (R) is provided at both ends of the C. If the DC voltage (VD) is applied through, when a short circuit between the barbed wire (H) and the ground (GND), a virtual RL is generated between the barbed wire and the ground, the leakage current (IL) Since the voltage across C (between a and b) VC is lower than VD due to the voltage drop caused by R, it is a method of detecting the leakage by detecting this.

이와 같이 된 본 발명은 전기 철조망이 설치된 장소에서 누전을 탐지하여 작동신뢰성을 높이고 전기 소모를 막을 수 있는 이점이 있다.The present invention as described above has the advantage to increase the operating reliability and prevent electricity consumption by detecting a short circuit in the place where the electric barbed wire is installed.

본 발명은 고압 충격전류를 발생시키는 전기 철조망 회로에 적용된다.The present invention is applied to an electric barbed wire circuit for generating a high pressure shock current.

도 2에는 본 발명의 회로가 예시되어 있다.2 illustrates a circuit of the present invention.

본 발명은 도 2의 회로에서 고압트랜스(H.T)의 L 2측의 E와 접지(GND)사이에 대용량 커패시터(C)를 연결해두고 대용량 커패시터 양단에 전압강하용저항R을 통해 DC전압(VD)을 인가해두면, 철조망(H)과 대지(GND)사이에 누전이 될 경우, 철조망과 대지 사이엔 가상의 RL이 발생하는 것으로 볼 수 있고, 여기에 누설전류(IL)가 흐 르게 되어 C양단의 전압(a와 b사이점)VC는 R에 의한 전압강하로 VD 보다 낮아지게 되므로 이를 감지하여 누전여부를 알 수 있게 한 방법이다.In the circuit of FIG. 2, the large-capacitor C is connected between the E of the L 2 side of the high-voltage transformer HT and the ground GND, and the DC voltage VD is provided through the voltage drop resistor R across the large-capacity capacitor. If it is applied, if a short circuit occurs between the barbed wire (H) and the ground (GND), it can be seen that a virtual RL occurs between the barbed wire and the ground, the leakage current (IL) flows here, both ends of C Since the voltage (between a and b) of VC is lower than VD due to the voltage drop caused by R, it is a method of detecting a short circuit by detecting it.

즉, VD전압은 비록 R을 통해 C양단에 공급되고 있더라도 누전이 안되는 상태에서는 전류(IL)가 흐르지 않으므로 전압강하가 일어나지 않아 VC전압은 VD 그대로이나, 만일 철조망과 대지 사이에 누전이 되어 RL이 발생한다면 누설전류IL이 흐르게 되고, 이 전류를 R에서 전압강하를 일으키므로 이때 VC전압은 VD보다 낮아진다.That is, even though VD voltage is supplied to both ends of C through R, current (IL) does not flow in the state of no leakage, so no voltage drop occurs, so VC voltage remains as VD, but if RL is shorted between barbed wire and earth, If so, leakage current IL flows, and this current causes a voltage drop at R, and thus the VC voltage becomes lower than VD.

예를 들어 R을 10㏀으로 설정해두었다면,For example, if you set R to 10㏀,

1. 누전이 되지 않을 경우 RL은 무한대이므로 1. If there is no short circuit, RL is infinite

Figure 112009014050126-pat00001
Figure 112009014050126-pat00001

2. 그러나 누전이 될 경우, RL이 발생, 그 저항치가 역시 R과 같은 10㏀이 되었다면, 2. However, in case of a short circuit, if RL occurs and its resistance is also 10㏀, equal to R,

Figure 112009014050126-pat00002
Figure 112009014050126-pat00002

VC = 1/2 VD가 되어, VD의 1/2값으로 낮아진다.VC = 1/2 VD, which is lowered to 1/2 of VD.

즉, VC가 VD보다 낮아진다는 말은 누전이 된다는 뜻(RL이 발생한 상태)이므로 VC전압을 Rd를 통해 Comparator의 -입력측에 전달, VC전압이 Comparator의 +입력측에 설정되어 있는 기준전압 Vr보다 낮아지면 출력(y측)은 +전압으로 나타나게 되어, 이 +전압을 누전탐지 신호로 이용한다면 결국 철조망과 대지 사이의 누전여부를 알아낼 수 있는 것이다.In other words, VC is lower than VD, which means short circuit (RL is generated). Therefore, VC voltage is transmitted to the-input side of the comparator through Rd, and VC voltage is lower than the reference voltage Vr set at the + input side of the comparator. The ground output (y side) appears as a + voltage, and if this + voltage is used as a ground fault detection signal, it is possible to find out whether the ground wire is between the wire and the ground.

상기에서 Rd, Cd는 C의 양단에 발생되는 pulse성 전압이 Comparator의 입력측에 전달되는 것을 막기 위한 Decoupling회로이다.In the above, Rd and Cd are decoupling circuits for preventing the pulsed voltage generated at both ends of C from being transmitted to the input side of the comparator.

도 1은 종래의 전기 철조망 회로도1 is a circuit diagram of a conventional electric wire

도 2는 본 발명의 구성도2 is a block diagram of the present invention

도 3은 본 발명의 누전 감지회로의 일부 확대도이다.3 is an enlarged view of a part of the ground fault detecting circuit of the present invention.

Claims (1)

고압 충격 전류를 발생시키는 전기철조망에서 고압이 발생되는 고압트랜스(H.T)의 2차측 권선(L 2)의 E측에서 접지(GND) 사이에 대용량 커패시터(C)를 연결해두고, 대용량 커패시터의 양단에 R을 통한 DC전압을 인가해 두어 대용량 커패시터의 양단에 발생되는 전압 VC를 감지하도록 하여 철조망이 대지와의 사이에서 누전이 될 경우 VC가 강하되는 것을 탐지하여 누전을 알아내는 전기 철조망의 누전탐지 방법Connect the large capacitor (C) between the ground (GND) at the E side of the secondary winding (L 2) of the high voltage transformer (HT) in which the high voltage is generated in the electric barbed wire generating the high voltage shock current. Applying a DC voltage through R to sense the voltage VC generated at both ends of the large-capacity capacitor to detect a short circuit by detecting a short circuit when the wire is shorted between the earth and the ground wire.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103472353A (en) * 2013-09-26 2013-12-25 国网河南省电力公司南阳供电公司 Method for seeking direct-current cross
CN104316820A (en) * 2014-10-30 2015-01-28 冯江生 Starter electric leakage detection hunting circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004343972A (en) 2003-05-19 2004-12-02 Matsushita Electric Works Ltd Electric leakage detection device
JP2006226879A (en) 2005-02-18 2006-08-31 Chugoku Electric Power Co Inc:The Leakage current measuring instrument
KR20080015650A (en) * 2006-08-16 2008-02-20 김보경 Electric leakage detecting system
JP2008232737A (en) 2007-03-19 2008-10-02 Kansai Electric Power Co Inc:The Electric leakage detection method and digital tester used in the same method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004343972A (en) 2003-05-19 2004-12-02 Matsushita Electric Works Ltd Electric leakage detection device
JP2006226879A (en) 2005-02-18 2006-08-31 Chugoku Electric Power Co Inc:The Leakage current measuring instrument
KR20080015650A (en) * 2006-08-16 2008-02-20 김보경 Electric leakage detecting system
JP2008232737A (en) 2007-03-19 2008-10-02 Kansai Electric Power Co Inc:The Electric leakage detection method and digital tester used in the same method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103472353A (en) * 2013-09-26 2013-12-25 国网河南省电力公司南阳供电公司 Method for seeking direct-current cross
CN103472353B (en) * 2013-09-26 2016-02-03 国网河南新野县供电公司 A kind of method of searching direct current swinging cross
CN104316820A (en) * 2014-10-30 2015-01-28 冯江生 Starter electric leakage detection hunting circuit

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